Roll-straightening machine



1967 P. SCHMITT ETAL 3,

I ROLL-STRAIGHTENING MACHINE Filed Dec. 14. 1965 INVENTORS ATTORNEY United States Patent 3,345,847 ROLL-STRAIGHTENING MACHINE Paul Schmitt, Saarbrucken, and Gerd Dittgen, Kutzhof,

Germany, assignors to Mannesmann-Meer Aktiengesellsclraft, a corporation of Germany Filed Dec. 14, 1965, Ser. No. 513,716 2 Claims. (Cl. 72-224) The invention relates to roll-straightening machines, and relates more particularly to roll-straightening machines for the straightening of either tubular or billet sections having square or rectangular outline. Still more particularly the invention relates to roll-straightening ma chines of this type wherein some of the rolls are adjustably positionable to accommodate sections of various cross sectional dimensions.

Tubular or billet sections with square or rectangular cross section come in a multiplicity of cross sectional dimensions. It has therefore been necessary for the straightening of such sections to have on hand a large number of roll-straightening tools. This necessitated not only a large investment in the inventory of these tools to be kept on hand at all times, 'but also required a great deal of time for the changing of the roll-straightening machine from one size of section to another.

Remedial solutions have been sought in the past, and these attempts included the provision of two exchangeable straightening rolls which are, though not paired, disposed at the same side of the section, and to adjust the rolls by vertical and horizontal shifting of the rolls, thereby to work only at one form of cross section. This required, however, that the straightening rolls had a certain shape, needing exchange of the rolls if another shape was to be worked on. Reference is had to 1956 Werkstatt- Technik und Maschinenbau, No. 12.

It is accordingly among the principal objects of the invention to provide an adjustable roll-straightening machine that avoids the aforesaid drawbacks of the prior art.

. It is another object of the invention to provide a machine of this type which is adjustable to various square and rectangular sections to be straightened.

It is a further object of the invention to provide such a machine, which is easy to adjust to the required dimensions of the section to be straightened.

It is still another object of the invention to provide such a machine wherein four rolls are rotatable each about an axis at right angle to the two adjoining rolls, so that the four rolls define a passage of square or rectangular outline, for the section to be straightened.

It is still a further object of the invention to provide such a machine wherein one of the rolls is immovable except for rotation, the roll opposite thereto is shiftable along its axis parallel to the axis of the immovable roll and at right angle thereto, and each of the other rolls is shiftable in a single direction only.

Further objects and advantages of the invention will be set forth in part in the following specification and in part will be obvious therefrom withiout being specifically referred to, the same being realized and attained as pointed out in the claims hereof.

The foregoing and other objects of the invention will be best understood from the following description of an exemplification thereof, reference being had to the accompanying drawings, wherein:

FIG. 1 is a sectional view of a roll-straightening machine in accordance with the invention, shown applied to a section of large size square cross section; and

FIG. 2 is a sectional view, similar to FIG. 1, but showing the rolls adjusted to a section of smaller square cross section as compared to FIG. 1.

In carrying the invention into effect in one of the embodiments which has been selected for illustration in the 3,345,847 Patented Oct. 10, 1967 accompanying drawing and for description in this specification, there is provided a divided housing 1 in which there are journalled four cylndrical rolls, 2, 3, 4 and 5. The rolls are all journalled about axes which are at right angles and all disposed in a plane perpendicular to the direction of feeding through the machine of the section to be straightened in the machine. The rolls 2, 3, 4 and 5 define a passage for the section. V

All the rolls are journalled for rotation, each about its own axis of rotation of its own axle. The roll 2 on the right-hand side of the drawing is immovable, except for its rotation. The other rolls, 3, 4, and 5, are shiftable as follows: The upper roll 3 is shiftable only vertically, thus parallel to the axis of rotation of the immovable roll 2. The ower roll 5 is shiftable horizontally in the direction of its own axis of rotation and at right angle to the axis of rotation of the immovable roll 2. Thus, the roll 4 as well as the roll 5 are movable each only in a single direction. In contrast thereto, the roll 4, which is disposed opposite the immovable roll 2, is shiftable vertically as well as horizontally.

In order to ascertain that the distance of the external diameter of the upper roll 3 from the upper front surface of the left horizontal roll 4 remains fixed, a first axle 6 of the upper roll 3 is connected to a second axle 7 of the roll 4. Thus, when the upper roll 3 is shifted vertically, there will at the same time be shifted vertically the left roll 4.

A similar coupling connection is provided between the axle 7 of the roll 4 and the axle of the lower roll 5. Thus, when the axle 7 is moved horizontally, the roll 4 as well as the roll 5 will be moved horizontally.

A first bearing 10 is provided for the first axle 6, and a manually or otherwise adjustable spindle 8 is provided for shifting the bearing 10 and therewith the axle 6 of the roll 3; and similarly a second bearing 11 is provided for the second axle 7 and a manually or otherwise operable spindle 9 for moving the axle 7 horizontally.

By this arrangement, the rolls, 3, 4, and 5 may be adjusted for square sections as well as for rectangular sections by the adjustment of but two items, namely, the spindles 8 and 9. Furthermore, between the immovable roll 2 and the lower roll 5 which is movable only horizontally there is formed a fixed corner which dispenses with the need for special adjustment of the machine, promoting a rapid adjustment to any section to be straightened by the machine.

As previously mentioned, the instant invention has the advantage that on changing to another section size, the same machine may be used by merely adjusting the spindles 8 and 9.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Having thus described the invention, what I claim as new and desire to be secured by Letters Patent, is as follows:

1. In a roll-straightening machine, for use in straightening sections including tubular and billet sections of rectangular including square outline, adjustable roll-straightening tools comprising four cylindrical rolls, each rotatable about its axis of rotation, the axes of adjoining rolls forming right angles with each other, said axes thus completing a rectangle and being disposed in one plane perpendicular to the feeding direction of said sections through the machine, the rolls defining a passage for the section to be straightened, each roll being adapted to work on a side of the section to be straightened, an axle journalling each roll for rotation about its axis, one of said rolls being positioned immovably save for rotation, the other three rolls being shiftable with their axles, the axles for said three shiftable rolls being shiftable, means operable for shifting the shiftable axles comprising a first bearing for the first shiftable axle of the roll opposite said immovable roll, said first bearing being shiftable in opposite directions at right angle to the axis of said immovable roll, and a second bearing journalling the second shiftable axle of another of said shiftable rolls, said second bearing being shiftable in opposite directions parallel to the axis of said immovable roll, said second shiftable axle being connected to said first shiftable axle so that when the said second bearing is shifted only the first and second shiftable axles will together be shifted in a direction parallel to the axis of the immovable roll, said second shiftable axle being connected to the third shiftable axle of the third shiftable roll so that when said first bearing is shifted only the second and third axles will together be shifted in a direction at right angle to the axis of said immovable roll.

2. In a roll-straightening machine, for use in straightening sections including tubular and billet sections of rectangular including square outline, adjustable roll-straightening tools comprising four cylindrical rolls, each rotatable about its axis of rotation, the axes of adjoining rolls forming right angles with each other, said axes thus completing a rectangle and being disposed in one plane perpendicular to the feeding direction of said sections through the machine, the rolls defining a passage for the section to be straightened, each roll being adapted to work on a side of the section to be straightened, an axle journalling each roll for rotation about its axis, one of said rolls being positioned immov ably save for rotation, the other three rolls being shiftable with their axles, the axles for said three shiftable rolls being shiftable, means operable for shifting the shiftable axles comprising a first bearing for the first shiftable axle of the roll opposite said immovable roll, said first bearing being shiftable in opposite directions at right angle to the axis of said immovable roll, and a second bearing journalling the second shiftable axle of another of said shiftable rolls, said second bearing being shiftable in opposite directions parallel to the axis of said immovable roll, said first shiftable axle being connected to said second shiftable axle, and said second shiftable axle being connected to the third shiftable axle in such a manner that said first shiftable axle can be shifted in a direction parallel to as well as in a direction at right angle to the axis of said immovable roll, and each of the other shiftable axles being shiftable in only a single of said directions.

References Cited UNITED STATES PATENTS 484,108 10/ 1892 Mossberg 72-224 1,974,566 9/ 1934 Garrett 72224 2,071,712 2/1937 Stuting 72224 RICHARD J. HERBST, Primary Examiner.

H. D. HOINKES, Assistant Examiner. 

1. IN A ROLL-STRAIGHTENING MACHINE, FOR USE IN STRAIGHTENING SECTIONS INCLUDING TUBULAR AND BILLET SECTIONS OF RECTANGULAR INCLUDING SQUARE OUTLINE, ADJUSTABLE ROLL-STRAIGHTENING TOOLS COMPRISING FOUR CYLINDRICAL ROLLS, EACH ROTATABLE ABOUT ITS AXIS OF ROTATION, THE AXES OF ADJOINING ROLLS FORMING RIGHT ANGLES WITH EACH OTHER, SAID AXES THUS COMPLETING A RECTANGLE AND BEING DISPOSED IN ONE PLANE PERPENDICULAR TO THE FEEDING DIRECTION OF SAID SECTIONS THROUGH THE MACHINE, THE ROLLS DEFINING A PASSAGE FOR THE SECTION TO BE STRAIGHTENED, EACH ROOL BEING ADAPTED TO WORK ON A SIDE OF THE SECTION TO BE STRAIGHTENED, AN AXLE JOURNALLING EACH ROLL FOR ROTATION ABOUT ITS AXIS, ONE OF SAID ROLLS BEING POSITIONED IMMOVABLY SAVE FOR ROTATION, THE OTHER THREE ROLLS BEING SHIFTABLE WITH THEIR AXLES, THE AXLES FOR SAID THREE SHIFTABLE ROLLS BEING SHIFTABLE, MEANS OPERABLE FOR SHIFTING THE SHIFTABLE AXLES COMPRISING A FIRST BEARING FOR THE FIRST SHIFTABLE AXLE OF THE ROLL OPPOSITE SAID IMMOVABLE ROLL, SAID FIRST BEARING BEING SHIFTABLE IN OPPOSITE DIRECTIONS AT RIGHT ANGLE TO THE AXIS OF SAID IMMOVABLE ROLL, AND A SECOND BEARING JOURNALLING THE SECOND SHIFTABLE AXLE OF ANOTHER OF SAID SHIFTABLE ROLLS, SAID SECOND BEARING BEING SHIFTABLE IN OPPOSITE DIRECTIONS PARALLEL TO THE AXIS OF SAID IMMOVABLE ROLL, SAID SECOND SHIFTABLE AXLE BEING CONNECTED TO SAID FIRST SHIFTABLE AXLE SO THAT WHEN THE SAID SECOND BEARING IS SHIFTED ONLY THE FIRST AND SECOND SHIFTABLE AXLES WILL TOGETHER BE SHIFTED IN A DIRECTION PARALLEL TO THE AXIS OF THE IMMOVABLE ROOL, SAID SECOND SHIFTABLE AXLE BEING CONNECTED TO THE THIRD SHIFTABLE AXLE OF THE THIRD SHIFTABLE ROLL SO THAT WHEN SAID FIRST BEARING IS SHIFTED ONLY THE SECOND AND THIRD AXLES WILL TOGETHER BE SHIFTED IN A DIRECTION AT RIGHT ANGLE TO THE AXIS OF SAID IMMOVABLE ROLL. 